included e-Paper library

cmake still not links but sees includes

libs/epaper/Config/DEV_Config.c

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+/*****************************************************************************
+* | File      	:   DEV_Config.c
+* | Author      :   Waveshare team
+* | Function    :   Hardware underlying interface
+* | Info        :
+*----------------
+* |	This version:   V3.0
+* | Date        :   2019-07-31
+* | Info        :   
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documnetation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of theex Software, and to permit persons to  whom the Software is
+# furished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+******************************************************************************/
+#include "DEV_Config.h"
+
+#define SPI_PORT spi1
+
+/**
+ * GPIO
+**/
+int EPD_RST_PIN;
+int EPD_DC_PIN;
+int EPD_CS_PIN;
+int EPD_BUSY_PIN;
+int EPD_CLK_PIN;
+int EPD_MOSI_PIN;
+
+/**
+ * GPIO read and write
+**/
+void DEV_Digital_Write(UWORD Pin, UBYTE Value)
+{
+	gpio_put(Pin, Value);
+}
+
+UBYTE DEV_Digital_Read(UWORD Pin)
+{
+	return gpio_get(Pin);
+}
+
+/**
+ * SPI
+**/
+void DEV_SPI_WriteByte(uint8_t Value)
+{
+    spi_write_blocking(SPI_PORT, &Value, 1);
+}
+
+void DEV_SPI_Write_nByte(uint8_t *pData, uint32_t Len)
+{
+    spi_write_blocking(SPI_PORT, pData, Len);
+}
+
+/**
+ * GPIO Mode
+**/
+void DEV_GPIO_Mode(UWORD Pin, UWORD Mode)
+{
+    gpio_init(Pin);
+	if(Mode == 0 || Mode == GPIO_IN) {
+		gpio_set_dir(Pin, GPIO_IN);
+	} else {
+		gpio_set_dir(Pin, GPIO_OUT);
+	}
+}
+
+/**
+ * delay x ms
+**/
+void DEV_Delay_ms(UDOUBLE xms)
+{
+	sleep_ms(xms);
+}
+
+void DEV_GPIO_Init(void)
+{
+
+	EPD_RST_PIN     = 12;
+	EPD_DC_PIN      = 8;
+	EPD_BUSY_PIN    = 13;
+	
+	EPD_CS_PIN      = 9;
+	EPD_CLK_PIN		= 10;
+	EPD_MOSI_PIN	= 11;
+
+	DEV_GPIO_Mode(EPD_RST_PIN, 1);
+	DEV_GPIO_Mode(EPD_DC_PIN, 1);
+	DEV_GPIO_Mode(EPD_CS_PIN, 1);
+	DEV_GPIO_Mode(EPD_BUSY_PIN, 0);
+
+	DEV_Digital_Write(EPD_CS_PIN, 1);
+}
+/******************************************************************************
+function:	Module Initialize, the library and initialize the pins, SPI protocol
+parameter:
+Info:
+******************************************************************************/
+UBYTE DEV_Module_Init(void)
+{
+    stdio_init_all();
+
+	// GPIO Config
+	DEV_GPIO_Init();
+	
+    spi_init(SPI_PORT, 4000 * 1000);
+    gpio_set_function(EPD_CLK_PIN, GPIO_FUNC_SPI);
+    gpio_set_function(EPD_MOSI_PIN, GPIO_FUNC_SPI);
+	
+    printf("DEV_Module_Init OK \r\n");
+	return 0;
+}
+
+/******************************************************************************
+function:	Module exits, closes SPI and BCM2835 library
+parameter:
+Info:
+******************************************************************************/
+void DEV_Module_Exit(void)
+{
+
+}